<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .Con{
            color: brown;
            font-size: larger;
        }
        p{
            color: aquamarine;
            font-size: medium;
        }
        .Acont{
            color: bisque;
            font-size: larger;
        }
    </style>
</head>
<body>
    <p>八点</p>
    <p>九点</p>
    <p class="Con">十点</p>
    <P>
        <i>hello</i>this is a program
    </P>
    <h3 class="Con Acont">十一点</h3><!--两个class，一个名为Con ，一个名为Acont-->
</body>
</html>